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JEE Main202330 Jan 2023Morning ShiftPhysicsKinetic Theory of GasesActual

The pressure ( P ) and temperature ( T ) relationship of an ideal gas obeys the equation P T 2 = constant. The volume expansion coefficient of the gas will be :

Options

  1. A3 T 2
  2. B3 T 2
  3. C3 T 3
  4. D3 T

Correct answer

D. 3 T

Step-by-step solution

Given here, P T 2 = constant . . . 1 Using ideal gas equation, P V = n R T We have, P = n R T V Putting in equation 1 , P T 2 = n R T V × T 2 = constant ⇒ T 3 = K V       . . . 2 Differentiating the equation with respect to T , So, d d T K V = 3 T 2 ⇒ K d V d T = 3 T 2 ⇒ d V = 3 T 2 K d T ⇒ γ V = 3 T 2 K as   d V = γ V d T ⇒ γ = 3 T 2 K V = 3 T 2 T 3 = 3 T

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